SOFeX 2002 Melville and Polar Star cruises

DMO processing notes for in situ LVP data

PI: Ken Buesseler (WHOI)

18 April 2007: Prepared for OCB data system by Cyndy Chandler, OCB DMO (WHOI).

These data are from the filters from in-situ pumps (LVP)
operated by Ken Buesseler's group and used on both the Melville and Polar Star. These data have also been published in:

K. O. Buesseler, J. E. Andrews, S. Pike, M. A. Charette, L. E. Goldson, M. A. Brzezinski, and V. P. Lance, 2005.
"Particle export during the Southern Ocean Iron Experiment (SOFeX)".
Limnol. Oceanogr., 50(1). American Society of Limnology and Oceanography, Inc. pp.311-327.
(download PDF). The sampling and analysis methodology is also described in that publication.

Original Excel file received via email from PI:
copy of original Excel file

The 13C and 15N measurements were done by people in Mark Altabet's lab at UMass Dartmouth. Some notes from David Timothy (School for Marine Science and Technology
University of Massachusetts, Dartmouth, MA) accompanied the original Excel data file:

"These results are NOT blank subtracted! I don't think I included columns for
POC and PN per filter, but you'll see these can be calculated easily (volumes filtered are on the
spreadsheet). I won't be surprised if after blank subtraction there are negative values;
some of the > 54um samples had very low POM."

PI notes

The Buesseler lab "large volume pumps" used on the Melville and Polar Star were of similar design. These casts and data are also reported elsewhere in the OCB database. MULVFS, multiple unit large volume filtration system, another sampling device was only used on the Melville. The LVP's yield about 200-500L per sample, while MULVFS yield on order of 2000L or more. Also, MULVFS casts tend to go deeper, to 1000m, where as LVP samples concentrated on the upper 100-200m.

Contact: Ken Buesseler (WHOI)